Power-shovel.



E. MOORE.

POWER SHOVEL.

APPLICATION FILED SEPT. a. 1912.

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1,185,427. Patented m 30,1916.- V

WILLIAM'E. MOORE, orrrrrsiaunsn, PENNSYLVANIA.

' POWER-SHOVEL.

Specification of Letters Patent.

Patented May 30, 1916,

Application filed September 3, 1912. Serial No. 718,436.

To aZZwhom it may concern: Y V

Be it known that I, VILLIAM E. MooRE, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inPower-Shovels, of which the following is a specification.

This invention has for its object the provision of improved means forsupporting and manipulating the scooping member of the shovel known inpractice as the dipper, whereby a wider range of operations, greaternicety of control, ease of transportation,

and celerity of movements may be attained,

l the said shovel being capable of working in per handle which comprisestwo channel irons 8 and 9 rigidly connected by side latan. extremelylimited radial and vertical clearance.

Other objects andadvantages of the said invention'will more fully appearfrom the following description, in which reference will be had to theaccompanying drawings, wherein, Figure 1 is a side elevation showing oneembodiment of my said invention,an'd Fig. 2 a top plan view thereof.

Inthe accompanying drawings, 1 representsa car truck or running gear, ofany desired description on which is mounted a rotatable-cab 2, which wemay assume is of well known construction, being rotatable by means ofpower driven pinion 3 meshing with: a circular rack 4, the said cabresting on rollers 5 which travel on a circular track 6. v

The present invention is not concerned with the construction of the cabor the mode of manipulating the same, so that these features need not behere described in detail. 7

Referring now to the parts which have more particularly to do with myinvention, these include in the case shown, among other parts, a dipper7, which,'having no need for 'a swinging bottom, is preferablypermanently closed, except at its upper open ng or mouth. This dipper iscarried by a (11ptice braces 10, and this handle is initurn supportedfor longitudinal or telescopic movement in a rocking cradle orcantaliver frame comprising two parallel side frames 11 and l2 suitablybraced at four points by shafts or rods 13, 14,- '15 and 16 as shown. 7

The dipper handle travels longitudinally between two rollers 17 and 18mounted respectlvelyon the shafts 13 and 14 of the tilting cradle, thedipper handle resting and travelmg upon the roller 17 alone. The Weightof the dlpper andfother parts on the left (Fig 1) of the pivoted pointof the cradleis sufiiclent, however, to prevent an ,overbalanclng of thedipperon saidpivot in the wrong direction.- This cradle itself is 16 asa, pivot, and this shaft is mounted at or near the outer, ends of twoarms 32 and 33, whlch together we shall call the 'boom mounted betweenits ends to rock on shaft of the shovel. These arms are pivotally supeported in two brackets 34 and 35 respectively, made fast to the cab 2,and may be cross braced as shown. Unlike other shovels of whichapplicant 1s aware, the dipper of the present one is angularly movablearound an axis extending longitudinally of its handle, so that it may.be rotated to dump its contents or to any angle to accommodate it to a'desired out. For the said dipper, the same is madefast to a shaft 19extending, in the case shown, the length of the dipper handle andcarrying at its end opposite said dipper, which meshes through suitableintermediate gears 21 and 22 with a. pinion 23 fasten a shaft '24,journaled in suitable brackets 25 and'26 mounted on the dipper handle ator 1 near each end thereof as shown. This shaft 24 is square in crosssection between its purpose of thus manipulating the a gear 20 fastthereon,

bearings, and extends. through a square opening in gear 27 which it fitsin such manner as to permit relative movement between .the gear andshaft longitudinally of the-latter, but so as to prevent relativevrotary movement between these parts.

The gear 27 meshes w1th a pmion 28 on thearmature shaftof an electricmotor 29, made fastin any suitable way to the'tilting cradle. The

gear 27 may be held against movement longitudinally of shaft 24 by beingmounted be'seen' that by means of the motor 24, operating through thetrain of gears described, any desired an ular movement may be impartedto the dipper about the longitudinal axis of its stem 19.

For the purposebof instantly stopping the motor 29 at the desired point,it may be provided with any suitable brake mechanism which I haveindicated at 31, which we may assume is of several well known forms ofelectro-magnetic brakes. The motor 29 would in practice, be operatedfrom a controller located in the cab, but since no specific arrangementof these circuits is hereby claimed as a part of this invention,theseneed not be shown nor further described. 1

do not, however, limit my invention to an electric motor for drivingshaft 2%, since this may be driven by any desired form of motor orengine.

The boom is held up, raised and lowered on its pivot, by means of acable 36, the end of which is made fast in any suitable way on sheavesupport 37 the cable passing thence over sheave 38 2) onshaft 16, sheave89 anchored within the cab (Fig. 1) thence over sheave 4L0 also on theshaft 16, sheave 41 in the cab, to the winding drum 42 in the cab.

The cradle is rocked on its pivot 16 by a cable 4:3 made fast at one endas at l i, then passing successively over sheaves e5, e6, e7, 4E8, 49,50 and 51, thence to winding drum 52. The sheaves 4L5, l7, 49 and 51 aremounted on shaft 15, while sheaves a6, 18 and 50 are mounted on shaft 53mounted in brackets 54:, 55 fast to the lower portion of the front ofthe cab.

The dipper handle is moved longitudinally in the cradle or racked bymeans of two cables 56 and 57 made fast respectively to opposite ends ofthe dipper handle as at 58 and 59 and passing over sheaves 60, 61, 62and 63 to a winding drum 6a in the cab. When this drum is rotated in onedirection, it will wind in on one of said cables and to a correspondingextent wind out on the other, thereby pulling on the points 58 and 59 toimpart longitudinal movement to the dipper handle in the cradle ineither direction depending on the direction of rotation of the drum 6 L.

The drums 42, 52 and 64, I have indicated merely in outline, since thesemay be of any well known or desired kind, and may be operated by steamor electric power in the usual or any desired way. In Fig. 2, the cablesare omitted for the sake of clearness in the drawing.

The mechanism herein shown and described for supporting and manipulatingthe dipper possesses many practical advantages. The cantaliver mechanismand unusually short boom permit the shovel to be worked within verynarrow or limited radial and vertical clearances, which is a greatadvantage especially when the device is employed as a ditcher on trolleylines where the overhead trolley wire or other wires often limit theoperation of long boom shovels.

If used in loading ballast or excavating cuts, my improved shovel may beoperated in much narrower cuts and more confined or restricted placesthan may be done with the usual long boom shovel.

The rotary tilting of the dipper is advantageous not only in providing asimple and expeditious way ofdumping the material, but it has theadditional advantage that when the cab is turned to an angle with thetrack, as for example, when the shovel is being used to scoop out aditch along a railway track, the dipper may be so rotated as to cutparallel to the track, something which cannot be done with the commonform of ditcher.

This shovel is also admirably adapted to be driven under its own powerfrom place to place and to drive and load cars on both sides of it, thatis, the shovel may be coupled in between the cars; its dipper supportingmechanism being such as to form no obstruction to the adjacent cars, andwhen traveling from place to place on a railway track, for example, theboom may be swung into line with the track so as stacles along the rightof way, but even if allowed to remain at an angle to the track, the boomis so short that this may be done in many instances with safety. With anarrangement of this kind, the boom may be raised vertically and thedipper handle run back substantially horizon-tally into the cab, therebynot only housing a considerable portion of the mechanism, but this getsit well out of the way when unloading or when traveling for anyconsiderable dis tance along the track.

The propelling of power shovels under their own power from place toplace is an old and well known expedient in the art, so need not be heredescribed in detail.

lVh-ile I have herein shown but one specific embodiment of my invention,it should be understood that various structural modifications thereofmay be made without departing from the spirit of the invention and I donot therefore confine myself to the specific constructional detailsshown.

VVha-t I claim is:

1. A power shovel comprising a supporting structure, a boom pivotallyconnected thereto, a cradle pivotally mounted intermediate of its endsupon the outer end of said boom, said cradle comprising two side framesand upper and lower cross members embraced between said side frames, thelower of said cross members being located in advance of the upper one, adipper, a handle for said dipper extending between said upper and lowercross members and between said side frames, and supported upon the lowerof said cross members, and means attached to said cradle on the oppositeside of its pivotal point of support from the forto clear obward of saidcross members, cradle on its as described.

2. A power shovel comprising a supporting structure, a boom pivotallyconnected thereto, a cradle pivotally mounted intermediate of its endsupon the outer end of said boom, said cradle comprising two side framesand upper and lower rollers embraced between said side frames, the lowerroller being located in advance of the upper one, a dipper, a handle forsaid dipper extending between said upper and'lower rollers and betweensaidside frames, and supported upon the lower of said rollers, and meansattached to said cradle on the 0ppo site side of its pivotal point ofsupport from the forward roller for rocking said cradle on its pivotalsupport, substantially as described.

3. A power shovel comprising a supporting structure, a boom pivotallymounted for rocking said pivotal support, substantially Copies 01 thispatent may be obtained for five cents each, by addressing the thereon, acradle pivoted on said boom, a dipper, a handle for said dipper, a shaftsupported in said handle and connected to said dipper for rotating thesame around an axis extending longitudinally of said handle, a drivingshaft connected to said handle and adapted to move therewith1ongitudinally of said cradle, gearing forming a driving connectionbetween said shafts, a gear connected to said driving shaft topositively rotate therewith, but permitting said shaft to movelongitudinally thereof, andv a motor mounted on said cradle and adaptedto drive said gear for rotating said dipper. f

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM E. VMOORE.

Witnesses:

H. L. MITCHELL, E. M. BALSINGER.

Washington, D. 0.

Commissioner of Patents,

